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Asked Jan 22, 2019
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How do you determine which molecules have a cis-trans isomers?

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Expert Answer

cis-trans isomerism in organic compounds exists for alkenes. These are classified under geometric isomerism which are a class of stereoisomers wherein the isomerism exists due to the arrangement of groups around the double bond. This is a permanent isomerism and cannot be interchanged from cis to trans or vice versa by mere rotation about the bond. 

When two highest priority groups are placed on the same side of the double bond, it is termed as cis- isomer.

Whereas, when two highest priority groups are placed on the opposite sides of the doubl...

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